Synovial Hernia and Ganglion and Synovial Fistulae in Horses

These conditions are relatively uncommon, but are important in the differential diagnosis of fluid-filled swellings over the dorsal aspect of the carpus. A synovial hernia is a cyst arising from herniation of synovial membrane through a defect in the fibrous joint capsule or fibrous sheath of a tendon. Diagnosis of these conditions is confirmed with contrast radiography; if accessible, the hernia or fistula is surgically repaired.